What do you think about this video?

Eddy Higgins: very nice job. Might I ask what motor you used for this?

Chan Jia Hui: Hi this system is awesome! And I would like to try building it for my project. Can I get more details on how you build it, the steps of building system as well as the items needed. Hope you could help me in this area. Thank you ^-^

Roberto Moretti: when the actuator's piston is attached to the mobile lever can not turn

bc123132123132: How did you prevent the inner tube/piston from turning around with the threaded rod when it spins?

Roberto Moretti: @sworteu The tube is made of aluminum and I took it out of a closet but any tube with diameter of 2 cm will be fine. The motor is a geared motor. The piston is a empty aluminum bar with a nut. I put a plastic cap, previously drilled to slide the bar. I connected to the rotor a threaded rod. The support is made ​​of metal and plastic parts.
Greetings.

sworteu: where do you get the parts?(where to buy?)
What parts are needed?
Cool video, many thanks!